8/13/2023 0 Comments Cannot unmount disk mac format![]() ![]() ![]() macOs Ajuda Aqui 50.4K subscribers Subscribe 61K views 2 years ago I show in this video the solution to the disk. Connected it to the Mac, partitioned and formatted without issue. ![]() For example, you may encounter Formatting failed (Cannot unmount disk) or. And I can't erase the drive to get a brand new drive to work with. 0:00 / 3:52 Disk Erase failed with the error: Couldn’t unmount disk. 5 Answers Sorted by: 1 Just for the sake of having an answer here, this is what ended up fixing the problem: Connected the disk to a windows XP machine Deleted the existing FAT32 partition that the device shipped with using Disk Management under XP. Format to HTFS+ file system if you want to access the drive from a Mac OS. I backed up my startup drive to this drive so I could wipe and reinstall OSX on my new SU drive but now I can't delete items off the backup drive because the message says I can't delete backup items. I have backed it up and using DU tried to erase it = by both highlighting the drive identifier and the name - in both cases, whether I try to erase disk or set it to erase to one partition, I get a message saying it can't do it because it can't unmount the disk. I have a MacPro and 4 drives inside it, one of which I need/want to erase. If the Unable to Unmount Error is triggered by first aid or formatting a non-boot partition, you may be able to fix the error by booting from the Recovery partition that is included with all new versions of Mac OS X. in apple Every computer has a basic structure that dictates how it operates and a backup system in case something fails. sudo diskutil unmountDisk /dev/(enter here disk identifier name) Press return and enter your admin password if prompted. When a device cannot erase or partition the drive, users are delivered Couldnt Unmount Disk error or related messages. ![]()
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